Cell Membrane Structure Quiz
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Questions and Answers

What is the main function of the phospholipid bilayer?

  • Assisting in cellular tasks
  • Controlling the entry and exit of the cell (correct)
  • Stabilizing the cell membrane
  • Facilitating intercellular fluid movement
  • What is the hydrophobic region within the phospholipid bilayer primarily composed of?

  • Sterols
  • Proteins
  • Fatty acids (correct)
  • Carbohydrates
  • What role does diffusion play in the movement of molecules?

  • It causes molecules to move from low concentration to high concentration areas
  • It requires energy from the cell
  • It results from intrinsic thermal energy in molecules (correct)
  • It is not affected by temperature changes
  • What effect does the presence of sterols have on the cell membrane?

    <p>Stabilizes the membrane and makes it less permeable</p> Signup and view all the answers

    How do cells use energy to move molecules within the intercellular fluid?

    <p>Cells do not use any energy to move the molecules</p> Signup and view all the answers

    Which process allows the movement of water through a semi-permeable membrane from areas of high concentration to areas of low concentration?

    <p>Osmosis</p> Signup and view all the answers

    In a hypotonic solution, what happens to the water in relation to the cell?

    <p>Moves into the cell</p> Signup and view all the answers

    What is the term for the increase in pressure inside plant cells due to the movement of water molecules into the cells?

    <p>Turgor pressure</p> Signup and view all the answers

    What type of solutions have higher osmotic pressure in the fluid surrounding the cell, causing water to move out of the cell?

    <p>Hypertonic solutions</p> Signup and view all the answers

    Which type of proteins in the membrane help move molecules along the concentration gradient without additional energy input by the cell?

    <p>Transport proteins</p> Signup and view all the answers

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